| Cutting Solutions Turning, Laser, Waterjet, Bending, Welding, Grinding, Finishing, Assembly | Zeeland, MI | TurningLaserWaterjetBendingWeldingGrindingFinishingAssembly | - |
| Cutting Source Precision Milling, Turning, Bending, Welding, EDM, Stamping · ISO 9001 | Houston, TX | MillingTurningBendingWeldingEDMStamping | ISO 9001 |
| CV International, Inc Milling, Turning, Laser, Punching, Bending, Welding · ISO 9001 | Bend, OR | MillingTurningLaserPunchingBendingWelding | ISO 9001 |
| Cyclefab, LLC Milling, Turning, Welding | Renton, WA | MillingTurningWelding | - |
| D & D Automation Inc Milling, Turning, Welding, EDM | Terre Haute, IN | MillingTurningWeldingEDM | - |
| D & D Design & Manufacturing Inc Milling, Turning, Bending, Laser, Welding | Oklahoma City, OK | MillingTurningBendingLaserWelding | - |
| D & G Machine Products, LLC Milling, Turning, Bending, Laser, Welding · ISO 9001, AS9100 | Gorham, ME | MillingTurningBendingLaserWelding | ISO 9001, AS9100 |
| D & G Manufacturing LLC Milling, Turning, Welding | Aurora, CO | MillingTurningWelding | - |
| D & H Industries Inc Milling, Turning, Laser, Bending, Welding, Stamping, Grinding, Finishing · ISO 9001, ITAR | Oconomowoc, WI | MillingTurningLaserBendingWeldingStampingGrindingFinishing | ISO 9001, ITAR |
| D & S Machine Service Inc Milling, Turning, Welding · ISO 9001 | Luxemburg, WI | MillingTurningWelding | ISO 9001 |
| D.P. Tool Milling, Turning, Welding, EDM, Grinding, Assembly · ISO 9001, AS9100, ITAR | Avon, NY | MillingTurningWeldingEDMGrindingAssembly | ISO 9001, AS9100, ITAR |
| Dallas Precision Machining Milling, Turning, Bending, Laser, Welding, Waterjet, Metal AM · ISO 9001, AS9100, ITAR | Carrollton, TX | MillingTurningBendingLaserWeldingWaterjetMetal AM | ISO 9001, AS9100, ITAR |
| Damco, Inc Milling, Turning, Waterjet, Welding | New Bern, NC | MillingTurningWaterjetWelding | - |
| Danco Precision, Inc Milling, Turning, Laser, Welding, Stamping, EDM, Grinding, Assembly · ISO 9001, AS9100, ITAR | Phoenixville, PA | MillingTurningLaserWeldingStampingEDMGrindingAssembly | ISO 9001, AS9100, ITAR |
| Dark Threat Fabrication LLC Milling, Turning, Laser, Bending, Welding, Finishing · ISO 9001 | Heber Springs, AR | MillingTurningLaserBendingWeldingFinishing | ISO 9001 |
| David Packard Company, Inc Milling, Turning, Swiss, Grinding, Finishing, Assembly · ISO 9001, ITAR | Oxford, MA | MillingTurningSwissGrindingFinishingAssembly | ISO 9001, ITAR |
| Davis Industries Milling, Turning, Punching, Bending, Welding, Assembly · ISO 9001, AS9100 | Phoenix, AZ | MillingTurningPunchingBendingWeldingAssembly | ISO 9001, AS9100 |
| Davis Tool & Die, Inc Milling, Turning, Welding, Stamping, EDM, Grinding | Abbeville, MS | MillingTurningWeldingStampingEDMGrinding | - |
| Davis Tool Inc Milling, Turning, Laser, Waterjet, Punching, Bending, Welding, EDM, Grinding, Finishing, Assembly · ISO 9001, AS9100, ITAR, NADCAP | Hillsboro, OR | MillingTurningLaserWaterjetPunchingBendingWeldingEDMGrindingFinishingAssembly | ISO 9001, AS9100, ITAR, NADCAP |
| Davlan Engineering Inc Milling, Turning, Laser, Welding, Stamping | Saint Louis, MO | MillingTurningLaserWeldingStamping | - |
| DCP Tool Manufacturing, LLC Milling, Turning, Laser, Welding, EDM, Grinding, Finishing | Dayton, OH | MillingTurningLaserWeldingEDMGrindingFinishing | - |
| Dearborn Bortec LLC Milling, Turning, Waterjet, Welding, EDM, Grinding, Finishing · ISO 9001, AS9100, ITAR | Fryeburg, ME | MillingTurningWaterjetWeldingEDMGrindingFinishing | ISO 9001, AS9100, ITAR |
| Dechert Dynamics Corp Milling, Turning, Welding, Grinding · ISO 9001 | Palmyra, PA | MillingTurningWeldingGrinding | ISO 9001 |
| Decimal Engineering Milling, Turning, Laser, Stamping, EDM, Grinding, Finishing, Assembly · ISO 9001, AS9100, ITAR, NADCAP | Coral Springs, FL | MillingTurningLaserStampingEDMGrindingFinishingAssembly | ISO 9001, AS9100, ITAR, NADCAP |
| Deking Precision Inc Turning, Swiss · ISO 9001, AS9100 | Chatsworth, CA | TurningSwiss | ISO 9001, AS9100 |
| Delco LLC Milling, Turning, Welding, EDM, Grinding · ISO 9001, AS9100 | Akron, OH | MillingTurningWeldingEDMGrinding | ISO 9001, AS9100 |
| Dellinger Enterprises, Ltd Milling, Turning, Laser, Bending, Welding, Stamping, Finishing | Belmont, NC | MillingTurningLaserBendingWeldingStampingFinishing | - |
| Delta Hi-Tech Milling, Turning, Swiss, Laser, Bending, Welding, EDM, Finishing, Assembly · ISO 9001, AS9100, ITAR, NADCAP, ISO 13485 | Chatsworth, CA | MillingTurningSwissLaserBendingWeldingEDMFinishingAssembly | ISO 9001, AS9100, ITAR, NADCAP, ISO 13485 |
| Delta Machining Inc Milling, Turning, Welding, Grinding · ISO 9001 | Niles, MI | MillingTurningWeldingGrinding | ISO 9001 |
| Delta One Manufacturing LLC Milling, Turning, Laser, Welding, Finishing, Assembly | San Jose, CA | MillingTurningLaserWeldingFinishingAssembly | - |
| Demco Products Milling, Turning, Swiss, Finishing, Assembly · ISO 9001 | Oak Lawn, IL | MillingTurningSwissFinishingAssembly | ISO 9001 |
| Denny Grice Inc Turning, Swiss, Grinding, Finishing | Three Rivers, MI | TurningSwissGrindingFinishing | - |
| Denver Machine Shop Milling, Turning, Welding · ISO 9001 | Henderson, CO | MillingTurningWelding | ISO 9001 |
| Derecktor Marine Technology LLC Milling, Turning, Waterjet, Welding | Bristol, RI | MillingTurningWaterjetWelding | - |
| Design Metal, Inc Milling, Turning, Bending, Welding, Stamping · ISO 9001 | Oak Park, MI | MillingTurningBendingWeldingStamping | ISO 9001 |
| Deval Life Cycle Support LLC Milling, Turning, Welding, Assembly · ISO 9001, AS9100 | Philadelphia, PA | MillingTurningWeldingAssembly | ISO 9001, AS9100 |
| DGF Industrial Innovations Group, Ltd Milling, Turning, Bending, Welding · ISO 9001 | Gilford, NH | MillingTurningBendingWelding | ISO 9001 |
| Die Craft Milling, Turning, Welding, Waterjet · ISO 9001 | Cincinnati, OH | MillingTurningWeldingWaterjet | ISO 9001 |
| Die Technology, Inc Milling, Turning, Swiss, Bending, Stamping, EDM, Grinding · ISO 9001, CMMC | Saint Michael, MN | MillingTurningSwissBendingStampingEDMGrinding | ISO 9001, CMMC |
| Die-Mension Corp Milling, Turning, Welding, Stamping, EDM, Grinding | Brunswick, OH | MillingTurningWeldingStampingEDMGrinding | - |
| Dimark Precision Machining,, Inc Milling, Turning, Welding, Grinding | Pembroke, MA | MillingTurningWeldingGrinding | - |
| Dixon Tool & Die Co Inc Milling, Turning, Waterjet, Welding, EDM, Grinding · ISO 9001, CMMC | Tyrone, PA | MillingTurningWaterjetWeldingEDMGrinding | ISO 9001, CMMC |
| DK Machining LLC Milling, Turning, Welding, Assembly · ISO 9001, ITAR | Molalla, OR | MillingTurningWeldingAssembly | ISO 9001, ITAR |
| DM Machine and Tool LLC Turning, Finishing · ISO 9001, ITAR | Ridgeway, SC | TurningFinishing | ISO 9001, ITAR |
| Dms-South/bailey Tool LLC Milling, Turning, Welding, Stamping, EDM | Lancaster, TX | MillingTurningWeldingStampingEDM | - |
| Dolphin Manufacturing, Inc Milling, Turning, Finishing, Assembly · ISO 9001 | Taylor, MI | MillingTurningFinishingAssembly | ISO 9001 |
| Domaille Engineering, LLC Milling, Turning, Welding, EDM, Grinding, Assembly | Rochester, MN | MillingTurningWeldingEDMGrindingAssembly | - |
| Donahue Industries, Incorporated Milling, Turning, Swiss, Punching, Bending, Welding, Stamping, EDM, Grinding, Finishing | Shrewsbury, MA | MillingTurningSwissPunchingBendingWeldingStampingEDMGrindingFinishing | - |
| Douglas Machine & Engineering Milling, Turning, Bending, Welding, EDM · ISO 9001, AS9100, ITAR, CMMC | Davenport, IA | MillingTurningBendingWeldingEDM | ISO 9001, AS9100, ITAR, CMMC |
| DP Machining Inc Milling, Turning, Swiss, Stamping, Finishing | La Verne, CA | MillingTurningSwissStampingFinishing | - |